| 摘要: | 本論文旨在研究利用熔融混煉法製備聚丙烯/奈米二氧化矽(改質前後)之複合材料，探討此奈米複合材料之加工製程、光學性質、物理性質、機械性質、熱性質及動態機械性質。實驗使用3-甲基丙烯酸基丙基三甲氧基矽烷(MPS)接枝於奈米二氧化矽表面進行改質。用聚丙烯樹酯添加改質奈米二氧化矽和未改質奈米二氧化矽製備不同的成分克數(每一百克的聚丙烯所含該之成分克數)之奈米複合材料。
探討不同成分克數的SiO2和MPS-m-SiO2對聚丙烯樹酯奈米複合材料的形態學(粒徑分析、FT-IR、SEM、ESCA、XRD)、光學性質(透光度) 、物理性質(密度、空孔率)、機械性質(硬度、抗張強度、耐磨耗指數及耐衝擊強度)、熱性質(TGA、HDT、VST、MI、DSC)及動態機械性質(DMA)之性能及影響的差異程度。
實驗結果得知，經由FT-IR、TGA、XPS以及XRD可以證實名矽烷偶合劑接枝成功；在粒徑分析中改質前後之奈米二氧化矽皆在奈米等級；在SEM具有良好分散性能。添加奈米二氧化矽會提升聚丙烯/奈米二氧化矽複合材料之熱性質，耐熱性提升效果更顯著。在機械性質，添加奈米二氧化矽會使複合材料的抗張強度、耐衝擊強度、硬度提升，因此本次研究顯示添加奈米二氧化矽可以達到強化聚丙烯/奈米二氧化矽複合材料的效果。
This project object is to manufacture polypropylene (PP) / nano silica (include non-modify and modify) nanocomposites by melt intercalation process, and study the formed by the processing process, optical properties, physical properties, mechanical properties, thermal properties and dynamic mechanical properties of nanocomposites. The research used 3-methacryloxy propyl-trimethoxysilane (MPS) grafted nano silica surface modification. For polypropylene resin add prepared SiO2 and MPS-m-SiO2 nanocomposites with a different number of grams of composition (per 100 grams of resin contained in the composition of the number of grams).
Explore the different components of the number of grams of SiO2 and MPS-m-SiO2 nanometer morphology of polypropylene resin composites (Particle, FT-IR, SEM, ESCA, XRD), the optical properties (transmittance), physical properties (Density, Porosity), mechanical properties (Hardness, Tensile strength, Abrasion index and impact strength), thermal properties (TGA, HDT, VST, MI, DSC) and dynamic mechanical properties (DMA) for the performance and impact the degree of difference. Experimental observed results that by FT-IR, TGA, XPS and XRD can prove the success of silane coupling agent grafted via; in particle size analysis show nano silica (include non-modify and modify) are both in nano specification; good dispersion can be seen in SEM. when PP filled of nano-SiO2 will improve the thermal properties of polypropylene / nano-SiO2 composites, the effect of improving the heat resistance is more significant. In the mechanical properties, when PP filled of nano-SiO2 will improve the tensile strength, impact strength, hardness, As expected, the inclusion of nano-SiO2 could considerable improved the mechanical properties of polypropylene resin / nano-SiO2 nanocomposites. |
